how infants develop in size and weight, and the factors influencing their development
how infants' motor capabilities develop and the dynamic system of factors that interact to produce these dramatic motor developments
how infants' health and safety can be improved
about infants' nutritional needs, the problems associated with inadequate nutrition, and the advantages of feeding infants human breast milk
about the perceptual competencies of infants
how infants learn contingencies and how they remember over a long period of time
about the stages in which infants pass as they learn to solve problems and how they develop an understanding of the permanence of objects
how infants' cognitive development is enhanced through interactions with caregivers
about how infants become competent users of language, the developmental progression in early language acquisition, and the important role that caregivers play in helping children learn language
